package com.dyb.demo.collection;

import java.util.HashMap;

/**
 *
 * @author dyb
 * @date 2020/12/4
 */
public class MapTest {

    public static void main(String[] args) {

        MapTest mapTest = new MapTest();
        mapTest.t1();
    }


    private void t1() {
        HashMap<String, Object> map = new HashMap<>();
        map.put("key", "value");
        map.get("key");
    }
}
